More about current (255)

1-05-2006 | Lots of circuit variations exist on this theme. We would like to add one more, however, that’s not easily beaten for simplicity and reliabil...

1-03-2006 | Opamps seldom have an output current drive capability of greater than about 12 mA, and so they are not suitable for use in 20 mA current loo...

1-12-2005 | Measuring high-side current becomes a piece of cake when you use the ZXCT10xx range of devices from Zetex. The chips can produce a proportio...

1-11-2005 | There are three other designs of opamp besides the familiar type with high input impedance and low output impedance. In this article we find...

1-07-2005 | To get the maximum brightness and working life out of a high-power LED, it needs to be driven at the optimum specified current. Allowing the...

1-07-2005 | This circuit eventually surfaced while pondering over the design of a current indicator for a small power supply. Fortunately, it proved pos...

1-07-2005 | Overcurrent sensors using external low-resistance sense resistors are fairly common. However, the members of a new family of ICs from Maxim...

1-05-2005 | The circuit described here provides versatile, competent protection against extremely high inrush currents, all at a reasonable cost.

1-05-2005 | The LM2575 is a ‘Simple Switcher’ from National Semiconductor, which means it’s a switch-mode controller IC that’s relatively easy to use. I...

1-12-2004 | Ultrabright LEDs are becoming increasingly attractive for use in lighting and warning-signal applications. LEDs must be operated at a consta...